Preface This standard is based on the European Community Standard EN IO57: 1996 (Copper and copper alloys-Seamless round copper water pipes and copper gas pipes for sanitary and heating installations”, ASTM B88M: 1996 “Seamless steel water pipes” and JIS H 3300: 1997 (Copper and copper alloy pipes”, and formulated according to national conditions. Compared with foreign standards, the main technical differences of this standard are as follows:
① Two grades of T2 and TP2 are specified, while ENIO57 only has one grade of CWO24A. ASTM B88M also has only one grade of C1220O.
②In terms of mechanical properties, ENIO57 and ASTM B88M both have hardness requirements, which are not adopted in this standard.
③In terms of process performance, the ENIO57 standard specifies the flaring test, the bending test, and the crimping test. , ASTM B88M specifies the flaring test, flattening test, this standard specifies the flaring test or flattening test and bending test.
④The high-precision grade of this standard is basically equivalent to ENIO57 and ASTM B88M in terms of the allowable deviation of outer diameter. Class accuracy is slightly lower. The allowable deviation of wall thickness is equivalent to ENIO57 and ASTM B88M.
⑤The diameter size (nominal inner diameter) is specified, and the Japanese standard also makes regulations, but the ENIO57 standard and the United States do not.
⑥The maximum pipe material is given. Work pressure indicators are not specified by foreign standards. Appendix A of this standard is an appendix to the standard. This standard was proposed by the National Nonferrous Metals Industry Bureau. This standard is under the jurisdiction of the China Nonferrous Metals Industry Standards Metrology and Quality Institute. This standard is issued by China Nonferrous Metals Industry Standards Institute of Metrology and Quality.
The Institute of Metrology and Quality of Metal Industry Standards, Shanghai Zhonghe Copper Tube Industry Co., Ltd., and Guangdong Dongli Gaobao Steel Pipe Manufacturing Co., Ltd. were responsible for drafting. This standard was drafted with the assistance of the International Copper Association. This standard was drafted by Luoyang Copper Processing Group Co., Ltd. , Shenyang Non-ferrous Metal Processing Plant, Shanghai Shenma Group Company, Xinxiang Oxygen-Free Copper Plant, Jiangxi Non-ferrous Smelting and Processing Plant, Tianli Pipe Fittings Co., Ltd. participated in the drafting. The main drafters of this standard: Yang Lijuan, Qian Qiaopeng, Wu Zhe Min, Fan Shunke, Jiang Chunrong, Meng Huijuan, Sui Yi, Liu Guosheng. 1 Scope This standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation and storage for drawing seamless steel pipes and copper air pipes. This standard applies to transportation. Seamless round copper pipes for drinking water, sanitary water, civil natural gas, gas, oxygen, and other media that have no corrosive effect on copper, with a nominal outer diameter not greater than 219 mm. Copper water pipes are generally welded, flared or compressed Connected with pipe joints.
2 Reference Standards The provisions contained in the following standards constitute provisions of this standard through quotation in this standard. When this standard is published, the editions shown are valid. All standards will be revised and this standard will be used All parties should explore the possibility of using the latest version of the following standards. GB/T 228-1987 Metal Tensile Test Method GB/T 241-1990 Metal Pipe Hydraulic Test Method GB/T 242-1997 Metal Pipe Flaring Test Method GB/ T 244—1997 Metal pipe bending test method G B/T 246-1997 Metal tube flattening test method GB/T 5121.1-1996 Copper and copper alloy chemical analysis method Determination of copper content GB/T 5121.2-1996 Copper and copper alloy chemical analysis method Determination of phosphorus content GB/T 5121.3 -1996 Copper and copper alloy chemical analysis methods Lead content Ng determination GB/T 5121.4-1996 Copper and copper alloy chemical analysis methods Determination of carbon and sulfur content GB/T 5121.5-1996 Copper and copper alloy chemical analysis methods Determination of nickel content GB/T 5121.6-1996 Copper and copper alloy chemical analysis methods Determination of iron content GB/T 5121.7-1996 Copper and copper alloy chemical analysis methods Determination of arsenic content GB/T 5121.8-1996 Copper and copper alloy chemical analysis methods Oxygen content Determination of GB/T 5121.9-1996 Copper and copper alloy chemical analysis methods Determination of iron content GB/T 5121.10-1996 Copper and copper alloy chemical analysis methods Tin content determination GB/T 5121.11-1996 Copper and copper alloy chemical analysis methods Determination of zinc content GB/T 5121.12-1996 Copper and copper alloy chemical analysis methods Determination of antimony content GB/T 5248-1998 Copper and copper alloy seamless pipe eddy current flaw detection method GB/T 6397-1986 Metal tensile test specimen GB ／T 8888-1988 Heavy non-ferrous metal processing products packaging, marking, transportation and storage 3 Order form (or contract) content The order form (or contract) for pipes listed in this standard should include the following content: 3.1 material name; 3.2 brand number; 3.3 Supply status; 3.4 specifications and accuracy grade; 3.5 weight or number of roots; 3.6 choice of non-destructive test; 3.7 carbon layer test; 3.8 special requirements; 3.9 this standard number; 3.10 others. 4 Requirements 4.1 Product classification 4.1.1 Brand, status, specification The brand, status, and specification of the pipe shall meet the requirements of Table 1.
Note: When the buyer has other specifications, the specifications and corresponding deviation requirements should be indicated in the contract
4.1.2 Marking example The straight pipe made of T2 in semi-hard state, outer diameter of φ22mm, wall thickness of 1.2mm, and length of 5800mm is marked as: straight pipe T2Y2φ22×1.2x5800GB/T 18033-2000, soft state made of TP2, The coil with an outer diameter of φ18mm and a wall thickness of 1.0mm is marked as: Coil TP2Mφ18×1.0GB/T 18033-20004.2 Chemical composition The chemical composition of the pipe shall meet the requirements of Table 2. Table 2 The chemical composition of the pipe
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